Xbase++

Yahoo Mail Refresh OAuth2 Access Token

See more Yahoo Mail Examples

Demonstrates how to refresh an OAuth2 Yahoo Mail access token. Xbase++

LOCAL nSuccess
LOCAL oJsonToken
LOCAL oOauth2
LOCAL oSbJson

nSuccess := 0

//  This example requires the Chilkat API to have been previously unlocked.
//  See Global Unlock Sample for sample code.

//  It is assumed we previously obtained an OAuth2 access token.
//  This example loads the JSON access token file 
//  saved by this example: Get Yahoo Mail OAuth2 Access Token

oJsonToken := CreateObject("Chilkat.JsonObject")
nSuccess := oJsonToken:LoadFile("qa_data/tokens/yahooMail.json")
IF (nSuccess != 1)
    ? "Failed to load googleSheets.json"
    oJsonToken:destroy()
    RETURN
ENDIF

//  The access token JSON looks like this:

//  {
//    "access_token": "kCVQdnOdul...LHucA--",
//    "refresh_token": "AIenVWETSo0jklFBVkPS8vVm8E.Dj9ToRG.xDbDYmZ55WIs5t6CZhDkD",
//    "expires_in": 3600,
//    "token_type": "bearer",
//    "xoauth_yahoo_guid": "HGDQCVF6JB4YDOWHITPJFBHCWA"
//  }

oOauth2 := CreateObject("Chilkat.OAuth2")

//  See Step 5 at https://developer.yahoo.com/oauth2/guide/flows_authcode/
oOauth2:TokenEndpoint := "https://api.login.yahoo.com/oauth2/get_token"

//  Replace these with actual values.
oOauth2:ClientId := "CLIENT_ID"
oOauth2:ClientSecret := "CLIENT_SECRET"

//  Get the "refresh_token"
oOauth2:RefreshToken := oJsonToken:StringOf("refresh_token")

//  Send the HTTP POST to refresh the access token..
nSuccess := oOauth2:RefreshAccessToken()
IF (nSuccess != 1)
    ? oOauth2:LastErrorText
    oJsonToken:destroy()
    oOauth2:destroy()
    RETURN
ENDIF

//  The response contains a new access token, but we must keep
//  our existing refresh token for when we need to refresh again in the future.
oJsonToken:UpdateString("access_token", oOauth2:AccessToken)

//  Save the new JSON access token response to a file.
oSbJson := CreateObject("Chilkat.StringBuilder")
oJsonToken:EmitCompact := 0
oJsonToken:EmitSb(oSbJson)
oSbJson:WriteFile("qa_data/tokens/yahooMail.json", "utf-8", 0)

? "OAuth2 authorization granted!"
? "New Access Token = " + oOauth2:AccessToken

oJsonToken:destroy()
oOauth2:destroy()
oSbJson:destroy()